Neoperla (Formosita) bimaculata Li, Wang & Li 2021

Zwick, Peter, 2023, A new classification of genus Neoperla and systematic studies of other Perlinae (Plecoptera: Perlidae), Zootaxa 5339 (2), pp. 101-131 : 115

Neoperla (Formosita) bimaculata Li, Wang & Li 2021 , presumed female

( Figs. 53–55 )

Material studied: 2♀, India, Himachal Pradesh, Barog nr Solan [30.88°, 77.10°], 1550m, 17.7.92, leg. Julka & Bala (Zoological Survey of India). 1♀, Bhutan, Dorjee Khandu Dukpa , Kharbandi [26°50‘20‘‘, 89°23‘30‘‘], 700m (Mus. Basel) .

The very characteristic pigmentation ( Fig. 54 ) makes me believe these are the unknown females of N. bimaculata which was named from Tibet (Motuo, Beibeng, 29°14’45.11’’ N, 95°10’16.21’’E). The species is apparently widespread in the Himalaya.

Female genitalia ( Fig. 55 ) similar to N. fasciata but the vaginal extension is twice as long as the base of the vagina and is curved. It is uncertain if it contains a longitudinally folded sclerite, or a pair of closely appressed sclerites. The egg with triplets ( Fig. 53 )

Figures

FIGURES 50–56. Neoperla (Formosita) spp. of the fasciata-group. Holotype of N. (F.) fasciata new species: 50, head and pronotum; 51–52, vagina in dorsal and lateral views. Neoperla (F.) sp., cf. N. (F.) bimaculata Li et al. 2021: 53, egg; 54, head and pronotum; 55, vagina, dorsal view; 56, N. (F.) montivaga Zwick. Not to scale. od, common oviduct; sa, spermatheca; sd, spermathecal duct; v, vagina. 56 from Zwick (1977), the others are originals.